ip flow ingress
Does not seem to be supported on my supervisor engine. It is a WS-X6K-SUP2-2GE running IOS 12.1(27b).
Did you apply the ip route-cache to all the interfaces that you are interested in monitoring?
Also, try this command
ip flow ingress layer2-switched vlan 10, 11, 111, etc
I think you may need one additional command to get the information you're looking for. Try adding the following:
mls nde interface
Also, I utilize the following additional commands on my 6500s
ip flow-cache timeout active 1
mls aging long 64
mls aging normal 64
Hope that helps.